The semicolon used to be a part of the URL; issue with HN's URL parsing. I fixed it a bit ago, it works for me now. Does it still not work for you?

Looks like it's fixed now, thanks.

*Edit: Okay, I read both of the articles, and they were fairly interesting, so thanks. I do have a pet peeve / complaint though: Both of the articles purported to link to research, but neither actually did. the first article linked to a list of slide decks and the second article linked to a summary of research. I've read enough bad summaries now that I am working on becoming a primary sources junky. Do you know of any research on this issue that's been done?